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94
All
and more
about Sharp PC-1500
at
http://www.PC-1500.info
4-2-4. PC-1500 system memory map
0
In
the
MEO area
is
contained
such
as
the system
program
and
user
RAM area
acid
chc
MEI
is
used for
such as
1/
0 pon
.
Memory
bank
is
assigned by J>V and
PV for the
MEO<irCa of8000H
thru
BFFFH.
and
P
U
and
P
U
arc used to
assign
the PVarea of8000H thru
9FFFH
.
Address
OOOOH
thru
7FFFH
is
used
for the user aJ'ca
and 8000H thru
FFFFH for the system
are<o.
The
systen1
area
is
used by
the
n1
ncJnonic
progran1rningsysten1
by \vhich
the
Cf'lJ.
1/
0
J)C.
etc.
are contrtlllcd.
and
the
user area is
used
to
store
the
progran1
\vritten
in
BASI
C.
n1nen1onic
progran1r
ning
language
.
.
and
data.
With
chc
PC-
1500,
MEO
memory
area 4000H
thru
47FFH
and
7600H
thru
7BFFH
are
used
for
the
user memory
and
COOOH
thru
F
FFFH for
the
system
program.
When
che
C
E-150
OJ'
C
E-
158
is connected. the
system
program.
1/
0
po1
1.
a
nd
RAM
are
arrang.l'd as
sh(>\Vrt
in the next
page.
0
Upon
power
on
to
the
PC-1500.
ini1ialirntion
srnrts
for
peripheral
units
according to
the
systcn1
program
residing
in the s}
1
stcrr1
area.
and
the
user
area ROM
and
I~/\
r'i.1
are
checked
..
then
ic
becomes
ready
for
a
key
entry.
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